Three color photographs of Tamarix, (also known as salt cedar), a shrub or tree with flowers from the Salt Cedar family often planted for screens or windbreaks.

Four color photographs of Thalassia testudinum (also known as turtlegrass), a perennial flowering plant from the Hydrocharitaceae family found in large colonies, frequently near the Redfish Bay.

One color photo of Thelesperma (also known as green-thread), a perennial or annual flowering plant from the Aster family found in the Texas Coastal Bend.

Four color photographs of Tillandsia usneoides (also known as Spanish moss), a perennial flowering plant from the Pineapple family found in mottes and along wooded streams of the Texas Coastal Bend.

Two color photographs of Toxicodendron (also known as poison ivy), a deciduous vine or shrub from the Sumac family found in river or creek bottoms. All parts of this plant are poisonous on contact.

Two color photographs of Tradescantia ohiensis (also known as spiderwort), a perennial flowering plant from the Spiderwort family found in prairies, openings, and waste places and along roads of the Texas Coastal Bend.

Two color photographs of Tribulus terrestris, (also known as puncture-vine or goathead), an annual flowering plant from the Caltrop family found on various soils, mostly in waste places.

Two color photographs of Triodanis perfoliata (also known as Venus' looking-glass), an annual flowering plant from the Bluebell family found in prairies, openings, and waste places of the Texas Coastal Bend.

One color photograph of Typha, (also known as cat-tail), a perennial flowering plant from the Cat-Tail family found in wet fresh or brackish soils, mostly in ditches, swales, and marshes, and along stream and lake banks.